Hoshizaki America, Inc.

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1 Hoshizaki America, Inc. Modular Flaker Models F-1500MAH(-C) F-1500MWH(-C) F-1500MRH(-C) A Superior Degree of Reliability SERVICE MANUAL Number: Issued: Revised:

2 IMPORTANT Only qualified service technicians should attempt to service or maintain this icemaker. No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual. HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance. HOSHIZAKI AMERICA, INC. 618 Highway 74 South Peachtree City, GA Attn: HOSHIZAKI Technical Support Department Phone: Technical Service (770) Fax: (770) Web Site: Note: To expedite assistance, all correspondence/communication MUST include the following information: Model Number Serial Number Complete and detailed explanation of the problem 2

3 CONTENTS I. Specifications Icemaker... 5 F-1500MAH... 5 F-1500MAH-C... 6 F-1500MWH... 7 F-1500MWH-C... 8 F-1500MRH... 9 F-1500MRH-C Condenser Unit URC-12F II. General Information Construction F-1500MAH(-C) F-1500MWH(-C) F-1500MRH(-C) Control Box Layout F-1500MAH(-C) F-1500MWH(-C), F-1500MRH(-C) III. Technical Information Water Circuit and Refrigeration Circuit F-1500MAH(-C) F-1500MWH(-C) F-1500MRH(-C) Wiring Diagrams F-1500MAH(-C) F-1500MWH(-C) F-1500MRH(-C) Sequence of Electrical Circuit Timing Chart Performance Data F-1500MAH F-1500MAH-C F-1500MWH F-1500MWH-C F-1500MRH F-1500MRH-C IV. Adjustment of Components Adjustment of Water Regulating Valve (water-cooled model only) Adjustment of Flake Size Adjustment of Cubelet Size V. Service Diagnosis No Ice Production Low Ice Production Other

4 VI. Removal and Replacement of Components Service for Refrigerant Lines [a] Refrigerant Recovery [b] Evacuation and Recharge [R-404A] Brazing Removal and Replacement of Compressor Removal and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of Water Regulating Valve (water-cooled models only) Removal and Replacement of Condensing Pressure Regulator (C.P.R.) (remote air-cooled model only) Removal and Replacement of Evaporator Assembly Removal and Replacement of Fan Motor Removal and Replacement of Control Water Valve Removal and Replacement of Flush Water Valve VII. Cleaning and Maintenance Preparing the Icemaker for Long Storage Cleaning and Sanitizing Instructions [a] Cleaning Solution [b] Cleaning Procedure [c] Sanitizing Solution [d] Sanitizing Procedure - Initial [e] Sanitizing Procedure - Final Maintenance Instructions

5 I. Specifications 1. Icemaker F-1500MAH AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 9.8 RLA 56 LRA GEAR MOTOR 120 V 5.6 FLA 1/2 HP FAN MOTOR 115 V 0.85FLA 1/15 HP OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1590 (721) 1514 (687) 1447 (656) Reference without *marks (627) 1321 (599) 1262 (572) (547) *1170 (531) 1100 (499) (477) 1005 (456) *945 (429) SHAPE OF ICE Flake ICE QUALITY Approx. 70%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 1863 (3.83) 1820 (2.74) POTABLE WATER 140 (12) 191 (12) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 30" x 27-1/2" x 34-7/16" (762 x 699 x 874mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT, appoximate Net 300 lbs. ( 136 kg ), Shipping 325 lbs. ( 148 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/2 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model CS10K6E-PFV CONDENSER Air-cooled, Fin and tube type EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 2 lb.5oz. (1050g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Circuit Protector (10A) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED Spare Fuse -REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 5

6 F-1500MAH-C AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 9.8 RLA 56 LRA GEAR MOTOR 120 V 5.6 FLA 1/2 HP FAN MOTOR 115 V 0.85FLA 1/15 HP OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) (590) 1245 (565) 1194 (542) Reference without *marks (520) 1099 (498) 1054 (478) (458) 990 (449) 930 (422) (404) 855 (388) 800 (363) SHAPE OF ICE Cubelet ICE QUALITY Approx. 70%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 1863 (4.5) 1820 (3.36) POTABLE WATER 119 (12) 156 (12) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 30" x 27-1/2" x 34-7/16" (762 x 699 x 874mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT, appoximate Net 300 lbs. ( 136 kg ), Shipping 325 lbs. ( 148 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/2 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model CS10K6E-PFV CONDENSER Air-cooled, Fin and tube type EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 2 lb.5oz. (1050g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Circuit Protector (10A) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED Spare Fuse -REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 6

7 F-1500MWH AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 9.8 RLA 56 LRA GEAR MOTOR 120 V 5.6 FLA 1/2 HP FAN MOTOR 115 V 0.51A 8W OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1435 (652) 1390(632) 1360(618) Reference without *marks (607) 1310(595) 1285(584) (573) *1245 (566) 1210(546) (539) 1160(527) *1075 (489) SHAPE OF ICE Flake ICE QUALITY Approx. 70%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 1780(3.4) 1792(3.0) POTABLE WATER 149 (12) 172 (12) WAER COOLED CONDENSER 675 (54) 435 (30) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 30" x 27-1/2" x 34-7/16" (762 x 699 x 874mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT, approximate Net 300 lbs. ( 136 kg ), Shipping 325 lbs. ( 148 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - WATER SUPPLY Inlet 1/2" FPT Cond. Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT Cond. Outlet 3/8" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/2 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model CS10K6E-PFV CONDENSER Water-cooled, Tube in tube type EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 1 lb.4oz. (575g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Circuit Protector (10A) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED Spare Fuse -REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 7

8 F-1500MWH-C AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 9.8 RLA 56 LRA GEAR MOTOR 120 V 5.6 FLA 1/2 HP FAN MOTOR 115 V 0.51A 8W OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1125 (511) 1075 (488) 1060 (482) Reference without *marks (477) 1040 (470) 1025 (465) (460) *975 (443) 990 (449) (445) 970 (439) *905 (411) SHAPE OF ICE Cubelet ICE QUALITY Approx. 80%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 1756 (4.3) 1852 (4.0) POTABLE WATER (12) 135 (12) WATER-COOLED CONDENSER 632 (65) 435 (39) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 30" x 27-1/2" x 34-7/16" (762 x 699 x 874mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT, approximate Net 300 lbs. ( 132 kg ), Shipping 325 lbs. ( 143 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - WATER SUPPLY Inlet 1/2" FPT Cond. Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT Cond. Outlet 3/8" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/2 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model CS10K6E-PFV CONDENSER Air-cooled Remote Condenser Unit URC-12F Recommended EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 1 lb.4oz. (575g) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Circuit Protector (10A) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED Spare Fuse -REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 8

9 F-1500MRH AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 9.8 RLA 56 LRA GEAR MOTOR 120 V 5.6 FLA 1/2 HP FAN MOTOR 115 V 3A MAX 0.51A 8W OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1585 (720) 1532(695) 1484(673) Reference without *marks (653) 1394(632) 1351(613) (594) *1300 (590) 1230(558) (541) 1155(524) *1070 (485) SHAPE OF ICE Flake ICE QUALITY Approx. 70%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 2015(3.72) 2010 (3.01) POTABLE WATER 156 (12) 190 (12) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 30" x 27-1/2" x 34-7/16" (762 x 699 x 874mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT, appoximate Net 290 lbs. ( 132 kg ), Shipping 315 lbs. ( 143 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/2 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model CS10K6E-PFV CONDENSER Air-cooled Remote Condenser Unit URC-12F Recommended. EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 9 lb.9oz. (4350g) (Ice Maker: 5lb. 2oz., Cond. Unit: 4lb. 7oz.) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Circuit Protector (10A) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED Spare Fuse -REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 9

10 F-1500MRH-C AC SUPPLY VOLTAGE /60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 9.8 RLA 56 LRA GEAR MOTOR 120 V 5.6 FLA 1/2 HP FAN MOTOR 115 V 3A MAX 0.51A 8W OTHER 120 V 0.03A MAXIMUM FUSE SIZE 20 A MAX. HACR BREAKER (USA ONLY) 20 A MAX. CIRC. BREAKER (CANADA ONLY) 20 A MINIMUM CIRCUIT AMPACITY 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. ( F) PER 24 HR. Temp.( F) lbs./day ( kg/day ) 70 *1335 (606) 1294 (587) 1258 (571) Reference without *marks (555) 1188 (539) 1155 (524) (509) *1120 (508) 1060 (481) (468) 1002 (454) *925 (420) SHAPE OF ICE Cubelet ICE QUALITY Approx. 80%, Ice (90/70 F, Conductivity 200 µs/cm) APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70 F 70/50 F ELECTRIC W (kwh/100 lbs.) 1949 (4.18) 1947 (3.50) POTABLE WATER 134 (12) 160 (12) gal./24hr (gal./100 lbs.) EXTERIOR DIMENSIONS (WxDxH) 30" x 27-1/2" x 34-7/16" (762 x 699 x 874mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT, appoximate Net 290 lbs. ( 132 kg ), Shipping 315 lbs. ( 143 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - WATER SUPPLY Inlet 1/2" FPT - DRAIN Outlet 3/4" FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger ( 1/2 HP Gear Motor ) ICE MAKING WATER CONTROL Float Switch COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Mechanical Bin Control ( Proximity Sw. ) COMPRESSOR Hermetic, Model CS10K6E-PFV CONDENSER Air-cooled Remote Condenser Unit URC-12F Recommended EVAPORATOR Copper Tube on Cylinder REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R-404A, 9 lb.9oz. (4350g) (Ice Maker: 5lb. 2oz., Cond. Unit: 4lb. 7oz.) DESIGN PRESSURE High 427 PSIG, Low 230 PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-off Relay COMPRESSOR PROTECTION Internal Protector GEAR MOTOR PROTECTION Circuit Protector (10A) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch and Timer ACCESSORIES -SUPPLIED Spare Fuse -REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE V AMBIENT TEMP F WATER SUPPLY TEMP F WATER SUPPLY PRESSURE PSIG We reserve the right to make changes in specifications and design without prior notice. 10

11 2. Condenser Unit URC-12F 11

12 SPECIFICATIONS MODEL: URC-12F AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR (QTY. 2) 115 V Total 2.6FLA 130W EXTERIOR DIMENSIONS (WxDxH) DIMENSIONS INCLUDING LEGS (WxDxH) EXTERIOR FINISH 35-11/16" x 15-11/16" x 21-15/16" (907.2 x 398 x mm) 37-13/16" x 18-1/8" x 36-15/16" (960 x 460 x mm) Galvanized Steel WEIGHT Net 80 lbs. ( 36 kg ) Shipping 115 lbs. ( 52 kg ) CONNECTIONS - ELECTRIC Permanent - Connection - REFRIGERATION Discharge Line 1-1/16-12 UNF Fitting (#10 AEROQUIP) Liquid Line 5/8-18 UNF Fitting (#6 AEROQUIP) CONDENSER FAN MOTOR PROTECTION REFRIGERANT CONTROL Air-cooled, Fin and tube type Thermal Protection Condensing Pressure Regulator REFRIGERANT CHARGE R-404A 4 lbs. 7oz. (2000g) DESIGN PRESSURE High 467 PSIG OPERATING CONDITIONS VOLTAGE RANGE 104 ~ 127 V AMBIENT TEMP. -20 ~ 122 F ACCESSORIES -SUPPLIED Leg 2 pcs Hex. Head Bolt w/washer 8 x 16 8 pcs Hex. Nut 8 8 pcs We reserve the right to make changes in specifications and design without prior notice. 12

13 II. General Information 1. Construction F-1500MAH(-C) Control Water Valve Water Supply Inlet Ice Chute Evaporator Fan Motor Gear Motor Condenser Compressor Drier Junction Box Bin Control Control Box Expansion Valve Flush Water Valve 13

14 F-1500MWH(-C) Control Water Valve Water Supply Inlet Ice Chute Evaporator Water Regulator Condenser Gear Motor Compressor Drier Junction Box Bin Control Control Box Expansion Valve Flush Water Valve 14

15 F-1500MRH(-C) Control Water Valve Water Supply Inlet Ice Chute Evaporator Gear Motor Receiver Tank Compressor Drier Junction Box Bin Control Control Box Expansion Valve Flush Water Valve 15

16 2. Control Box Layout F-1500MAH(-C) A 12P Plug Housing L Starting Capacitor B Cam Timer M Timer Board C Relay N Rocker Switch D Transformer O 4P Plug Housing E Circuit Protect Relay P Toggle Switch F Water Control Relay Q 6P Plug Housing G Gear Motor Protect Relay R Fuse H Spout Control Relay S 3P Plug Housing I Starter T 4P Plug Housing J Capacitor U Protector K Run Capacitor V Spout Indicator W Capacitor Note: The above component names are identical with the Wiring Label, but not with the Parts List. 16

17 F-1500MWH(-C), F-1500MRH(-C) A 12P Plug Housing L Starting Capacitor B Cam Timer M Timer Board C Relay N Rocker Switch D Transformer O 4P Plug Housing E Circuit Protect Relay P Toggle Switch F Water Control Relay Q 6P Plug Housing G Gear Motor Protect Relay R Fuse H Spout Control Relay S 3P Plug Housing I Starter T 4P Plug Housing J Capacitor U Protector K Run Capacitor V Spout Indicator 17

18 III. Technical Information 1. Water Circuit and Refrigeration Circuit F-1500MAH(-C) 18

19 F-1500MWH(-C) 19

20 F-1500MRH(-C) 20

21 2. Wiring Diagrams F-1500MAH(-C) 21

22 F-1500MWH(-C) 22

23 F-1500MRH(-C) 23

24 3. Sequence of Electrical Circuit [a] When power switch is moved to ON position and flush switch to ICE position, water starts to be supplied to reservoir. 24

25 [b] When reservoir has been filled, gear motor starts immediately. 25

26 [c] Compressor starts about 60 sec. after gear motor starts. 26

27 [d] Bin control operates, and about 6 sec. later, compressor and gear motor stop simultaneously. 27

28 [e] Low water (except water-cooled model). 28

29 [f] When flush timer operates (for 21 min. every 12 hours) or when flush switch is moved to FLUSH position, flush water valve opens and flushes reservoir and evaporator. 29

30 [g] When V are supplied to circuit protect relay, it protects the circuit from being miswired. If the power supply is properly connected, the contact of circuit protect relay does not move even when the coil is energized. 30

31 [h] When pressure switch opens, power supply to the control board is cut off causing the compressor and gear motor to turn off immediately. 31

32 4. Timing Chart 32

33 33

34 34

35 35

36 36

37 5. Performance Data F-1500MAH APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR lbs./day kg/day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal. / day l/day EVAPORATOR OUTLET TEMP F C HEAD PRESSURE PSIG kg/sq.cmg SUCTION PRESSURE PSIG kg/sq.cmg TOTAL HEAT OF REJECTION 15,323 BTU/h (AT 90 F /WT 70 F) * We reserve the right to make changes to specifications and design without prior notice. 37

38 F-1500MAH-C APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR lbs./day kg/day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal. / day l/day EVAPORATOR OUTLET TEMP F C HEAD PRESSURE PSIG kg/sq.cmg SUCTION PRESSURE PSIG kg/sq.cmg TOTAL HEAT OF REJECTION 15,323 BTU/h (AT 90 F /WT 70 F) * We reserve the right to make changes to specifications and design without prior notice. 38

39 F-1500MWH APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR lbs./day kg/day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR TOTAL gal. / day kg/day EVAPORATOR OUTLET TEMP F C HEAD PRESSURE PSIG kg/sq.cmg SUCTION PRESSURE PSIG kg/sq.cmg TOTAL HEAT OF REJECTION FROM CONDENSER 13,874 BTU/h (AT 90 F /WT 70 F) TOTAL HEAT OF REJECTION FROM UNIT 2,109 BTU/h (AT 90 F /WT 70 F) * We reserve the right to make changes to specifications and design without prior notice. 39

40 F-1500MWH-C APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR lbs./day kg/day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR TOTAL gal. / day l/day EVAPORATOR OUTLET TEMP F C HEAD PRESSURE PSIG kg/sq.cmg SUCTION PRESSURE PSIG kg/sq.cmg TOTAL HEAT OF REJECTION FROM CONDENSER 13,874 BTU/h (AT 90 F /WT 70 F) TOTAL HEAT OF REJECTION FROM UNIT 2,109 BTU/h (AT 90 F /WT 70 F) We reserve the right to make changes to specifications and design without prior notice. 40

41 F-1500MRH APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR lbs./day kg/day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal. / day kg/day EVAPORATOR OUTLET TEMP F C HEAD PRESSURE PSIG kg/sq.cmg SUCTION PRESSURE PSIG kg/sq.cmg TOTAL HEAT OF REJECTION FROM CONDENSER 13,194 BTU/h (AT 90 F /WT 70 F) TOTAL HEAT OF REJECTION FROM UNIT 2,129 BTU/h (AT 90 F /WT 70 F) * We reserve the right to make changes to specifications and design without prior notice. 41

42 F-1500MRH-C APPROXIMATE Ambient Water Temp. (F) ICE PRODUCTION Temp. (F) PER 24 HR lbs./day kg/day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR gal. / day l/day EVAPORATOR OUTLET TEMP F C HEAD PRESSURE PSIG kg/sq.cmg SUCTION PRESSURE PSIG kg/sq.cmg TOTAL HEAT OF REJECTION FROM CONDENSER 13,194 BTU/h (AT 90 F /WT 70 F) TOTAL HEAT OF REJECTION FROM UNIT 2,129 BTU/h (AT 90 F /WT 70 F) We reserve the right to make changes to specifications and design without prior notice. 42

43 IV. Adjustment of Components 1. Adjustment of Water Regulating Valve (water-cooled model only) The water regulating valve or also called water regulator is factory-adjusted. No adjustment is required under normal use. Adjust the water regulator, if necessary, using the following procedures. 1) Attach a pressure gauge to the high-side line of the system. Or prepare a thermometer to check the condenser drain temperature. 2) Rotate the adjustment screw by using a flat blade screwdriver, so that the pressure gauge shows 260 PSIG (R-404A models/-f type), or the thermometer reads F, in 5 minutes after the icemaking process starts. When the pressure exceeds 260 PSIG or the condenser drain temperature exceeds 104 F, rotate the adjustment screw counterclockwise. 3) Check that the pressure or the condenser drain temperature holds a stable setting. 43

44 2. Adjustment of Flake Size To adjust the flake size, change the number of the cutter heads on the top of the auger, according to the following procedures: 1) Remove the bolt. 2) Take off the upper cutter head of the two (coarse flakes) or set the upper cutter head on the lower (fine flakes). The unit is shipped from the factory with two cutter heads. FINE COARSE [two cutter heads] [one cutter head] 3) Secure the cutter head(s) with the bolt. 3. Adjustment of Cubelet Size Cubelet size is not adjustable. 44

45 V. Service Diagnosis 1. No Ice Production PROBLEM POSSIBLE CAUSE REMEDY [1] The icemaker will not a) Power Supply 1. OFF position. 1. Move to ON position. start. 2. Loose connection. 2. Tighten. 3. Bad contacts. 3. Check for contintinuity and replace. 4. Blown fuse. 4. Replace. b) Power Switch 1. Off position. 1. Move to ON position. (Control Box) 2. Bad contacts. 2. Check for continuity and replace. c) Fuse (Control Box) 1. Blown out. 1. Check for short circuit and replace. d) Circuit Protect Relay 1. Miswiring. 1. Check power supply voltage and wire properly. e) Flush Timer 1. Flushing out. 1. Wait for 15 minutes. 2. Bad contacts. 2. Check for continuity and replace. f) Flush Switch 1. FLUSH position. 1. Move to ICE position. 2. Bad contacts. 2. Check for continuity and replace. g) Transformer 1. Coil winding opened. 1. Replace. h) Control Water Valve 1. Coil winding opened. 1. Replace. i) Shut-off Valve 1. Closed. 1. Open. 2. Water failure. 2. Wait till water is supplied. j) Plug and Receptacle 1. Disconnected. 1. Connect. (Control Box) 2. Terminal out of Plug or 2. Insert Terminal back in Receptacle. position. k) Spout Control 1. Bin Control Broken. 1. Check Bin Control. Turn OFF Power Switch and turn it ON again. [2] Water does not stop, and the icemaker will not start. [3] Water has been supplied, but the icemaker will not start. a) Water Control Relay 1. Contact fused. 1. Replace. 2. Coil winding opened. 2. Replace. b) Float Switch 1. Bad contacts. 1. Check for continuity and replace. 2. Float does not move 2. Clean or replace. freely. c) Flush Water Valve 1. Valve seat clogged 1. Clean or replace. and water leaking. d) Hoses 1. Disconnected. 1. Connect. a) Water Control Relay 1. Bad contacts. 1. Check for continuity and replace. b) Bin Control 1. Bad contacts. 1. Check for continuity and replace. 2. Activator does not move freely. 2. Clean Axle and its corresponding holes or replace Bin Control. 45

46 PROBLEM POSSIBLE CAUSE REMEDY c) Gear Motor Relay 1. Coil winding opened. 1. Replace. 2. Bad contacts. 2. Check for continuity and replace. d) Control Timer 1. Broken. 1. Replace. (Printed Circuit Board) e) Gear Motor Protect 1. Coil winding opened. 1. Replace. Relay 2. Bad contacts. Check for continuity and replace. [4] Water has been a) Gear Motor Fuse (BUSSMAN GMD 1.5A) supplied, Fan Motor starts, but Gear Motor and Compressor will not start. b) Thermal Protector (Gear Motor) 1. Blown Fuse. 1. See "3. [3] Gear Motor Protector operates frequently." Find out the cause and replace the Fuse. 1. Bad contacts. 1. Check for continuity and replace. [5] Gear Motor starts, but Compressor (for Solenoid Valves) will not start or operates intermittently a) Pressure Switch 1. Dirty Air Filter or Condenser. 2. Ambient or condenser water temperature too warm. 1. Clean. 2. Get cooler. 3. Condenser water pressure too low or off. (Water-cooled model only) 4. Water Regulating Valve set too high. (Water-cooled model only) 3. Check and get recommended pressure. 4. Adjust it lower. 5. Fan not rotating. 5. See "3. [1] a) Fan Motor." 6. Refrigerant 6. Recharge. overcharged. 7. Refrigerant line or 7. Clean and replace drier. components plugged. 8. Bad contacts. 8. Check for continuity and replace. 9. Loose connections. 9. Tighten. b) X2 Relay on Control 1. Bad contacts. 1. Replace. Check for Timer continuity and replace. 2. Coil winding opened. 2. Replace Timer. c) Starter 1. Bad contacts. 1. Check for continuity and replace. 2. Coil winding opened. 2. Replace. 3. Loose Connections. 3. Tighten. d) Start Capacitor or Run Capacitor 1. Defective. 1. Replace. 46

47 PROBLEM POSSIBLE CAUSE REMEDY e) Compressor 1. Loose connections. 1. Tighten. 2. Motor winding opened 2. Replace. or grounded. 3. Motor Protector tripped. 3. Find out the cause of overheat or overcurrent. f) Power Supply 1. Circuit Ampacity too low. 1. Install a larger-sized conductor. [6] Gear Motor and Compressor start, but no ice is produced a) Refrigerant Line 1. Gas Leaks 1. Check for leaks with a leak detector. Reweld leak, replace drier and charge with refrigerant. The amount of refrigereant is marked on Nameplate 2. Refrigerant line clogged. or Label. 2. Replace the clogged component. 47

48 2. Low Ice Production PROBLEM POSSIBLE CAUSE REMEDY [1] Low ice production a) Refrigerant Line 1. Gas leaks. 1. See "1. [6] a) Refrigerant Line." 2. Refrigerant line clogged. 2. Replace the clogged component. 3. Overcharged. 3. Recharge. b) High-side Pressure Too 1. Dirty Air Filter or 1. Clean. High Condenser. 2. Ambient or condenser 2. Get cooler. water temperature too warm. 3. Condenser water pressure too low or off. [Water-cooled model only] 3. Check and get recommended pressure. 4. Fan rotating too slow. 4. See "3 [1] a) Fan Motor." 5. Water Regulating 5. Clean. Valve clogged. [Watercooled model only] c) Expansion Valve (not adjustable) 6. Condensing unit out of order. 1. Low-side pressure too low. 2. Low-side pressure too high. 6. Check condensing unit. 1. Replace. 2. See if Expansion Valve Bulb is mounted properly, and replace the valve if necessary. 48

49 3. Other PROBLEM POSSIBLE CAUSE REMEDY [1] Abnormal noise a) Fan Motor 1. Bearing worn out. 1. Replace. 2. Fan blade deformed. 2. Replace fan blade. 3. Fan blade does not 3. Replace. move freely. b) Compressor 1. Bearings worn out, or 1. Replace. cylinder valve broken. 2. Mounting pad out of 2. Reinstall. position. c) Refrigerant Lines 1. Rub or touch lines or 1. Replace. other surfaces. d) Gear Motor (Ice 1. Bearing or Gear worn 1. Replace. Making) out / damaged. e) Evaporator 1. Too much pressure 1. Replace. loss. 2. Scale on inside wall of Freezing Cylinder. 2. Remove Auger. Use "SCALE AWAY" or "LIME- A-WAY" solution to clean periodically. If the water is found hard by testing, install a softener. [2] Overflow from Reservoir (Water a) Water Supply 1. Water pressure too high. 1. Install a pressure Reducing Valve. does not stop.) b) Control Water Valve 1. Diaphragm does not 1. Clean or replace. close. c) Float Switch 1. Bad contacts. 1. Check for continuity and replace. [3] Gear Motor Protector a) Power Supply Voltage 1. Too high or too low. 1. Connect the unit to a operates frequently. power supply of proper voltage. b) Evaporator Assy 1. Bearings or Auger 1. Replace Bearing or Auger. worn out. c) Bin Control 1. Bad contacts. 1. Check for continuity and replace. 2. Activator does not move freely. 2. Clean Axle and its corresponding holes or replace Bin Control. 49

50 VI. Removal and Replacement of Components IMPORTANT 1. The Polyolester (POE) oils used in R-404A units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts. 2. Always install a new filter drier every time the sealed refrigeration system is opened. 3. Do not leave the system open for longer than 15 minutes when replacing or servicing parts. 1. Service for Refrigerant Lines [a] Refrigerant Recovery The icemaker unit is provided with two refrigerant access valves - one on the low-side and one on the high-side line. Using proper refrigerant practices recover the refrigerant from the access valves and store it in an approved container. Do not discharge the refrigerant into the atmosphere. [b] Evacuation and Recharge [R-404A] 1) Attach charging hoses, a service manifold and a vacuum pump to the system. Be sure to connect charging hoses to both high-side and low-side access valves. IMPORTANT The vacuum level and vacuum pump may be the same as those for current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils. 2) Turn on the vacuum pump. Never allow the oil in the vacuum pump to flow backward. 50

51 3) Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends on pump capacity. 4) Close the low-side valve and high-side valve on the service manifold. 5) Disconnect the vacuum pump, and attach a refrigerant service cylinder to the highside line. Remember to loosen the connection, and purge the air from the hose. See the nameplate for the required refrigerant charge. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No be used. 6) A liquid charge is recommended for charging an R-404A system. Invert the service cylinder. Open the high-side, service manifold valve. 7) Allow the system to charge with liquid until the pressures balance. 8) If necessary, add any remaining charge to the system through the low-side. Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low-side access port with the unit running. 9) Close the two refrigerant access valves, and disconnect the hoses and service manifold. 10) Cap the access valves to prevent a possible leak. 2. Brazing DANGER 1. Refrigerant R-404A itself is not flammable at atmospheric pressure and temperatures up to 176 F. 2. Refrigerant R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames) R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous. 3. Always recover the refrigerant and store it in an approved container. Do not discharge the refrigerant into the atmosphere. 4. Do not use silver alloy or copper alloy containing arsenic. 5. Do not use R-404A as a mixture with pressurized air for leak testing. Refrigerant leaks can be detected by charging the unit with a little refrigerant, raising the pressure with nitrogen and using an electronic leak detector. 51

52 Note: All brazing-connections inside the bin are clear-paint coated. Sandpaper the brazing connections before unbrazing the components. Use a good abrasive cloth to remove coating. 3. Removal and Replacement of Compressor IMPORTANT Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacements have been made. 1) Turn off the power supply, and remove the panels. 2) Remove the terminal cover on the compressor, and disconnect the compressor wiring. 3) Recover the refrigerant and store it in an approved container, if required by an applicable law. 4) Remove the discharge, suction, and access pipes from the compressor using brazing equipment. WARNING When repairing a refrigerant system, be careful not to let the burner flame contact any electrical wires or insulation. 5) Remove the bolts and rubber grommets. 6) Slide and remove the compressor. Unpack the new compressor package. Install the new compressor. 7) Attach the rubber grommets of the prior compressor. 8) Sandpaper the discharge, suction and access pipes. 9) Place the compressor in position, and secure it using the bolts. 10) Remove plugs from the discharge, suction and access pipes. 11) Braze the access, suction and discharge lines (Do not change this order), while purging with nitrogen gas flowing at the pressure of 3-4 PSIG. 52

53 12) Install the new drier. 13) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 14) Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge and type. 15) Connect the terminals to the compressor, and replace the terminal cover in its correct position. 16) Replace the panels in their correct position, and turn on the power supply. 4. Removal and Replacement of Drier IMPORTANT Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacements have been made. 1) Turn off the power supply, and remove the panels. 2) Recover the refrigerant and store it in an approved container, if required by an applicable law. 3) Remove the drier using brazing equipment. 4) Install the new drier with the arrow on the drier in the direction of the refrigerant flow. Use nitrogen gas at the pressure of 3-4 PSIG when brazing the tubings. 5) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 6) Evacuate the system, and charge it with refrigerant. For the water-cooled models, see the nameplate for the required refrigerant charge and type. For the remote air-cooled models, see the label on the control box. 7) Replace the panels in their correct position, and turn on the power supply. 53

54 5. Removal and Replacement of Expansion Valve IMPORTANT Sometimes moisture in the refrigerant circuit exceeds the drier capacity and freezes up at the expansion valve. Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repairs or replacements have been made. 1) Turn off the power supply, and remove the panels. 2) Recover the refrigerant and store it in an approved container, if required by an applicable law. 3) Remove the expansion valve bulb at the evaporator outlet. 4) Remove the expansion valve cover, and remove the expansion valve using brazing equipment. 5) Braze the new expansion valve with nitrogen gas flowing at the pressure of 3-4 PSIG. WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating. Do not braze with the valve body exceeding 250 F. 6) Install the new drier. 7) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 8) Evacuate the system. Charge it with refrigerant. For the water-cooled models, see the nameplate for the required refrigerant charge and type. For the remote air-cooled models, see the label on the control box. 9) Attach the bulb to the suction line. Be sure to secure the bulb using a band and to insulate it. 10) Place the new set of expansion valve covers in position. 11) Replace the panels in their correct position, and turn on the power supply. 54

55 6. Removal and Replacement of Water Regulating Valve (water-cooled models only) IMPORTANT Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacements have been made. 1) Turn off the power supply, remove the panels, and close the water supply line shut-off valve. 2) Recover the refrigerant and store it in an approved container. 3) Disconnect the capillary tube using brazing equipment. 4) Disconnect the flare-connections of the valve. 5) Remove the screws and the valve from the bracket. 6) Install the new valve, and braze the capillary tube. 7) Install the new drier. 8) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 9) Connect the flare-connections. 10) Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge and type. 11) Open the water supply line shut-off valve, and turn on the power supply. 12) Check for water leaks. 13) See IV. 1. Adjustment of Water Regulating Valve. If necessary, adjust the valve. 14) Replace the panels in their correct position. 55

56 7. Removal and Replacement of Condensing Pressure Regulator (C.P.R.) (remote air-cooled model only) IMPORTANT Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repairs or replacements have been made. 1) Turn off the power supply. 2) Remove the panels from the remote condenser unit. 3) Recover the refrigerant and store it in an approved container. 4) Remove the C.P.R. using brazing equipment. 6) Braze the new C.P.R. with nitrogen gas flowing at the pressure of 3-4 PSIG. WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating. Do not braze with the valve body exceeding 250 F. 7) Install the new drier in the icemaker. 8) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 9) Evacuate the system. Charge it with refrigerant. See the label on the control box in the icemaker. 9) Replace the panels in their correct position. 10) Turn on the power supply 56

57 8. Removal and Replacement of Evaporator Assembly 1) Turn off the power supply. 2) Remove the panels. 3) Move the flush switch to the FLUSH position. 4) Turn on the power supply and drain out all water from the water line. 5) Turn off the power supply. 6) Remove the strap connecting the spout to the chute assembly. 7) Remove the three thumbscrews and take off the spout from the evaporator. Cutter 8) Remove the bolt and lift off the cutter. 9) Remove the rubber O-ring and the nylon ring at the top of the evaporator. Extruding Head 10) Remove the three socket head cap screws and lift off the extruding head. 11) Replace the bearing inside the extruding head if it exceeds the wear tolerance of 0.02 or is scratched. Note: Replacing the bearing requires a bearing press adaptor. If it is not available, replace the whole extruding head. Auger 12) Lift off the auger. If the area in contact with the bearing is worn out or the blade scratched, replace the auger. Evaporator Note: Skip the following steps 13) through 15) when the evaporator does not need replacement. 13) Recover the refrigerant and store it in an approved container, if required by an applicable law. 57

58 IMPORTANT Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacements have been made. 14) Remove the bulb of the expansion valve. 15) Disconnect the brazing-connections of the expansion valve and the copper tubelow side from the evaporator, using brazing equipment. 16) Remove the two truss head machine screws and the bracket securing the evaporator. 17) Disconnect the three hoses from the evaporator. 18) Remove the four socket head cap screws securing the evaporator with the bearinglower. 19) Lift off the evaporator. Bearing-Lower and Mechanical Seal 20) The mechanical seal consists of two parts. One moves along with the auger, and the other is fixed on the bearing-lower. If the contact surfaces of these two parts are worn or scratched, the mechanical seal may cause water leaks and should be replaced. 21) Remove the O-ring on the bearing-lower. 22) Remove the four bolts and the bearing-lower from the gear motor. Replace the bearing inside the bearing-lower, if it exceeds the wear tolerance of 0.02 or is scratched. Note: Replacing the bearing requires a bearing press adaptor. If it is not available, replace the whole bearing-lower. Gear Motor 23) Remove the coupling-spline on the gear motor shaft. 24) Remove the barrier on the top of the gear motor. 25) Remove the three socket head cap screws securing the gear motor. 58

59 26) Assemble the removed parts in the reverse order of the above procedure. WARNING Be careful not to scratch the surface of the O-ring, or it may cause water leaks. Handle the mechanical seal with care not to scratch nor to contaminate its contact surface. 27) When replacing the evaporator; (a) Braze the new evaporator with nitrogen gas flowing at a pressure of 3-4 PSIG. (b) Replace the drier. (c) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. (d) Evacuate the system. Charge it with refrigerant. For the water-cooled models, see the nameplate for required refrigerant charge and type. For the remote air-cooled models, see the label on the control box. 28) Move the flush switch to the ICE position. 29) Replace the panels in their correct position. 30) Turn on the power supply. 59

60 Rubber O-ring Nylon Ring Bolt Dowel Pin Cutter Extruding Head Socket Head Cap Screw Strap Evaporator Socket Head Cap Screw Auger Mechanical Seal O-ring Housing Coupling - Spline Gear Motor 60

61 9. Removal and Replacement of Fan Motor 1) Turn off the power supply and remove the panels. 2) Remove the wire connectors from the fan motor leads. 3) Remove the fan motor bracket and fan motor. 4) Install the new fan motor. 5) Replace the panels in their correct position, and turn on the power supply. 10. Removal and Replacement of Control Water Valve 1) Turn off the power supply, remove the panels and close the water supply line shut-off valve. 2) Disconnect the terminals from the control water valve. 3) Loosen the fitting nut on the control water valve inlets, and remove the control water valve. 4) Remove the water supply hose from the control water valve. 5) Install the new control water valve. 6) Assemble the removed parts in the reverse order of the above procedure. 7) Open the water supply line shut-off valve. 8) Check for water leaks. 9) Replace the panels in their correct position, and turn on the power supply. 61

62 11. Removal and Replacement of Flush Water Valve 1) Turn off the power supply, remove the panels and close the water supply line shut-off valve. 2) Remove the clamp and disconnect the flush water valve. Note: Water may still remain inside the evaporator. Be sure to drain the water into the drain pan. 3) Disconnect the terminals from the flush water valve. 4) Remove the flush water valve from the frame or bracket. 5) Remove the drain pipe from the flush water valve. 6) Connect the drain pipe to the new flush water valve, and place the valve in position. 7) Connect the hose to the flush water valve and secure it with the clamp. 8) Pour water into the reservoir, and check for water leaks on the flush water valve. 9) Open the water supply line shut-off valve, and turn on the power supply. 10) Move the flush switch to the ICE position. 11) Check for water leaks. 12) Move the flush switch to the FLUSH position, and make sure water is flushing. 13) Move the flush switch to the ICE position. 14) Replace the panels in their correct position. 62

63 VII. Cleaning and Maintenance 1. Preparing the Icemaker for Long Storage IMPORTANT Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. WARNING When shutting off the icemaker for an extended time, drain out all water from the water line and remove the ice from the storage bin. The storage bin should be cleaned and dried. Drain the icemaker to prevent damage to the water supply line at sub-freezing temperatures, using air or carbon dioxide. Shut off the icemaker until the proper ambient temperature is resumed. [Air-Cooled Models and Remote Air-Cooled Models ] 1) Run the icemaker with the water supply line shut-off valve closed. 2) Open the drain valve and blow out the water inlet line by using air pressure. 3) Turn off the power supply. 4) Remove the front panel. 5) Move the flush switch on the control box to the FLUSH position. 6) Turn on the power supply, and then drain out all water from the water line. 7) Turn off the power supply. 8) Turn off the power switch on the control box. 9) Replace the front panel in its correct position. 10) Close the drain valve. 11) Remove all ice from the storage bin, and clean the bin. 63

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